/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.hadoop.hive.ql.ddl.table.misc;

import org.apache.hadoop.hive.ql.ddl.DDLOperationContext;
import org.apache.hadoop.hive.metastore.DefaultHiveMetaHook;
import org.apache.hadoop.hive.metastore.HiveMetaHook;
import org.apache.hadoop.hive.metastore.api.MetaException;
import org.apache.hadoop.hive.ql.ddl.DDLOperation;
import org.apache.hadoop.hive.ql.metadata.HiveException;

/**
 * Operation process of pre inserting a table.
 */
public class PreInsertTableOperation extends DDLOperation<PreInsertTableDesc> {
  public PreInsertTableOperation(DDLOperationContext context, PreInsertTableDesc desc) {
    super(context, desc);
  }

  @Override
  public int execute() throws HiveException {
    try {
      HiveMetaHook hook = desc.getTable().getStorageHandler().getMetaHook();
      if (hook == null || !(hook instanceof DefaultHiveMetaHook)) {
        return 0;
      }

      DefaultHiveMetaHook hiveMetaHook = (DefaultHiveMetaHook) hook;
      hiveMetaHook.preInsertTable(desc.getTable().getTTable(), desc.isOverwrite());
    } catch (MetaException e) {
      throw new HiveException(e);
    }

    return 0;
  }
}
